The automatic COSC-Accredited PF441 chronometer movement that this Parmigiani classic runs on provides a 55-hour ability reserve, owing to its oscillating mass, and that is in delicately engraved gold, and will be admired with the sapphire crystal caseback. And admire it you will, because it displays some of the best https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/